Planting season and time of Radix Isatidis

I think we are all very familiar with Radix Isatidis. It is the most commonly used Chinese herbal medicine in our lives. It is very effective in preventing and treating colds. Therefore, Radix Isatidis is available in ordinary families. It is widely used and the market demand is also very large.

Planting season and time of Radix Isatidis

The sowing season of Radix Isatidis is different, the products harvested are also different. According to the sowing time of Radix Isatidis, it can be divided into four stages: autumn sowing, early spring sowing, spring sowing and summer sowing. Autumn sowing and early spring sowing are mostly for the purpose of harvesting seeds, the roots of Radix Isatidis planted in these two periods can not be used as medicinal materials; summer sowing is suitable to be used in the areas with long plum rain season in the south, this method can reduce diseases and insect pests, but the yield is low. Radix Isatidis sown in spring can harvest both leaves and roots, and the yield is higher, so it is the most commonly used method.

Planting techniques of Radix Isatidis

1, soil preparation and fertilization: Banlan deep-rooted plants, suitable for warm and humid climate, drought and cold resistance, fear of waterlogging, easy to rot roots after flooding, general soil can be planted, but it is best to choose land with loose soil and good drainage. Can be combined with deep ploughing and reasonable fertilization, per mu can apply farm manure 3000-4000 kg, diammonium 15 kg, biological potash fertilizer 4 kg, evenly spread to the ground and turn more than 30 cm deep, and then make a flat bed 1 meter wide, which is conducive to the growth of the root, straight, smooth and less forks.

2. Sowing method: Radix Isatidis is suitable for spring sowing in the north, and it should be sowed timely and late, and the most suitable time is April 20-30. Before sowing, soak the seeds in 40-50 ℃ warm water for about 4 hours, remove and mix well with plant ash, open a shallow ditch with a row spacing of 20cm and a depth of 1.5cm, spread the seeds evenly in the ditch, cover the soil about 1cm, slightly suppress, properly water and moisturize. The temperature is suitable, and the seedlings can emerge in 7 ~ 10 days. The general seed consumption per mu is 2-2.5 kg.

3. Inter-seedling fixed seedling: after the emergence of Isatis root, when the seedling height is 7-8 cm, the seedling is fixed according to the plant spacing of 6-10 cm, to be weak and strong, and to make up for the lack of seedlings. When the seedling height is 10-12 cm, combined with ploughing and weeding, the seedlings are fixed according to the plant spacing of 6-9 cm, row spacing of 10-15 cm.

4. Intermediate ploughing and weeding: after the seedlings of Radix Isatidis were unearthed, the seedlings were ploughed lightly, and after the seedlings were fixed, the seedlings were ploughed. When weeds are 3-5 leaves, fine grasses can be sprayed with chemical herbicides to control Gramineae weeds, 40 ml per mu and 50 kg spray with water.

5. Topdressing and watering: those who harvest large green leaves should be topdressing three times a year. The first time is after planting, shallow ditches are opened between rows, 10-15 kg urea per mu is applied, and timely watering and moisturizing. The second to the third time is topdressing after harvesting big green leaves, in order to make the plant grow healthily and exuberantly, we can use farm fertilizer to apply phosphorus and potassium fertilizer properly. In the period of exuberant growth, the blue roots mainly did not cut the big green leaves, and applied less nitrogen fertilizer, and properly applied phosphorus and potassium fertilizer and plant ash, in order to promote root growth and increase yield.

6. Harvest processing: spring sowing Radix Isatidis can harvest leaves twice before root harvest, the first in mid-June and the second in mid-late August. Hot weather is not suitable for harvesting, so as not to cause mass death. Radix Isatidis should be dug in sunny days before the beginning of winter, and be sure to dig deep to avoid cutting off the roots. After lifting the soil, remove the soil stems and leaves, spread out to 70% to 80% dry, tie them into small bundles and then dry them all.

7. Seed retention technique: spring sowing Radix Isatidis should be collected before winter, and disease-free and robust roots should be selected and transplanted to the seed field according to the row spacing of 30 × 40 cm. Land reserved for planting should choose plots with shelter from the wind, good drainage and plenty of sunshine. The management of fertilizer and water should be strengthened when it grows in the coming year. When the seeds change from yellow to black in June and July, the whole plant will be harvested, dried and threshed. After harvesting the seeds, Radix Isatidis has been lignified and can no longer be used medicinally.

The function of Isatis Root

1. The effect of anti-pathogenic microorganisms: Radix Isatidis has an inhibitory effect on a variety of bacteria. Water extract has different inhibitory effects on Bacillus subtilis, Staphylococcus aureus, Octacoccus, Escherichia coli, Typhoid bacillus, Paratyphoid bacillus, Shigella flexneri, Enterobacter enteritis and so on. Acetone extract also has a similar effect on hemolytic streptococcus (all using Agar small-hole plate method). The bacteriostatic effect on type A meningococci was similar to that of garlic and honeysuckle. It has obvious inhibitory effect on influenza virus PR8 strain and Jingke 68-1 strain. Radix Isatidis can kill Leptospira in the test tube.

2. Cardiovascular effect: the experiment showed that the product could increase the perfusion flow of isolated rabbit ears and rat lower limbs, improve the mesenteric microcirculation of rabbits, reduce the blood pressure of anesthetized rabbits, reduce the capillary permeability, and decrease the myocardial oxygen consumption of mice.

3. Inhibition of platelet aggregation: Radix Isatidis has a significant inhibitory effect on rabbit platelet aggregation induced by ADP. Uridine, Hypoxanthine, pyrimidine and salicylic acid isolated from Radix Isatidis also showed certain inhibitory activity on rabbit platelet aggregation induced by ATP, and the inhibition rates at 0.21mg/kg concentration were 18.2%, 24.2%, 10.8% and 20%, respectively.

4. Detoxification: it has been reported that canine administration of Radix Isatidis and Coptis chinensis powder with Veratrum veratrum (each 2.0g/kg) can detoxify veratrum and reduce mortality; if Veratrum is poisoned, it will be ineffective; and the effect of using Radix Isatidis powder or Coptis chinensis powder alone is not good.

Planting benefit of Radix Isatidis

Radix Isatidis, a plant of the genus Cruciferae, is one of the commonly used bulk medicinal materials. In recent years, due to the increasing social demand and the steady rise in commodity prices of Radix Isatidis, the market of Radix Isatidis has been in short supply. Recommended by the State Administration of traditional Chinese Medicine as one of the 63 kinds of scarce traditional Chinese medicine. Therefore, the prospect of artificial cultivation of Radix Isatidis is very promising, and drug farmers can develop production on a large scale according to local conditions. Radix Isatidis is suitable for cultivation in all parts of our country. It can be sown in spring, summer and autumn. It takes only 6 to 7 months from seed to harvest, and can be replanted twice a year. It is a medicinal variety with low cost and quick effect. Take the planting of 1 mu of Radix Isatidis as an example:

1. Input: 2 kg of seeds, 200 yuan of seed money, 100 yuan of fertilizers (50 kg of phosphate fertilizer, 20 kg of compound fertilizer, 10 kg of urea), 30 yuan of pesticides and herbicides, totaling 330 yuan.

2. Income: Radix Isatidis produces 250 kilograms of tuber root every year (more than 400kg in high yield). At present, the market purchase price is 20,25 yuan / kg. According to the minimum output and price, the output value is 250kg × 20 yuan / kg = 5000 yuan.

3. Net profit: 5000 yuan-330yuan = 4670 yuan.

From the above analysis, we know that the cultivation of Radix Isatidis is still very promising, and its investment is not very high, but its income is still very considerable, but growers should not blindly follow the trend. To know the market situation of Banlangen in time.